On Thu, 3 Mar 2011 18:04:24 -0800, Guenter Roeck wrote: > Some fan control chips support a configuration register to set the number of > tachometer pulses per fan revolution. Add an ABI attribute to support this > configuration register. > > Signed-off-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> Acked-by: Jean Delvare <khali@xxxxxxxxxxxx> > --- > v2: Added more details to attribute description > > Documentation/hwmon/sysfs-interface | 11 +++++++++++ > 1 files changed, 11 insertions(+), 0 deletions(-) > > diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface > index c6559f1..83a6987 100644 > --- a/Documentation/hwmon/sysfs-interface > +++ b/Documentation/hwmon/sysfs-interface > @@ -187,6 +187,17 @@ fan[1-*]_div Fan divisor. > Note that this is actually an internal clock divisor, which > affects the measurable speed range, not the read value. > > +fan[1-*]_pulses Number of tachometer pulses per fan revolution. > + Integer value, typically between 1 and 4. > + RW > + This value is a characteristic of the fan connected to the > + device's input, so it has to be set in accordance with the fan > + model. > + Should only be created if the chip has a register to configure > + the number of pulses. In the absence of such a register (and > + thus attribute) the value assumed by all devices is 2 pulses > + per fan revolution. > + > fan[1-*]_target > Desired fan speed > Unit: revolution/min (RPM) -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
